
body{
    padding: 0;
    margin: 0;
}
.body_1{
    width: 1200px;
    margin: 0 auto;
    height: 800px;
}
.body_1 .mains{
    width: 600px;
    height: 400px;
    margin: 0 auto;
    padding-top: 200px;
}
.body_1 .mains .top{
    width: 600px;
    height: 100px;
    background-color: royalblue;
    text-align: center;
}
.body_1 .mains .top >span{
    font-family: 微软雅黑;
    font-size: 40px;
    color: white;
    line-height: 100px;
}
.body_1 .mains .center{
    width: 600px;
    height: 300px;
    background-color:  cornflowerblue;
    text-align: center;
}
.body_1 .mains .center .yonghu{
    padding-top: 30px;
}
.body_1 .mains .center .yonghu,.mima,.denglu{
    width: 600px;
    height: 50px;
    text-align: center;
    line-height: 50px;
    font-family: 微软雅黑;
    font-size: 20px;
    color: white;
}
.body_1 .mains .center .denglu >input{
    width: 100px;
    height: 25px;
    border-radius: 4px;
}